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HD64F36034 Datasheet(PDF) 376 Page - Renesas Technology Corp |
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HD64F36034 Datasheet(HTML) 376 Page - Renesas Technology Corp |
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376 / 592 page  Section 15 Controller Area Network for Tiny (TinyCAN) Rev. 4.00 Mar. 15, 2006 Page 344 of 556 REJ09B0026-0400 15.6 Interrupt Requests The TinyCAN has the following interrupt requests. These interrupts can be masked except for a reset processing interrupt caused by powering on. To mask them, the Mailbox interrupt mask register (MBIMR) and interrupt mask register (IMR) are used. Since these interrupt requests are allocated to the common vector addresses, their sources need to be identified by flags. Table 15.4 Interrupt Requests Interrupt Request Abbreviation Interrupt Condition Wakeup WUPI When falling edge of HRXD is detected in LSI standby mode Unread message OVRI When new message is received while MBIMR corresponding to receive message is 0 and RXPR or RFPR is 1 Mailbox empty EMPI When TXPR is cleared to 0 by completion of transmission or completion of transmission cancellation Overload frame transmission OVLI When overload frame is transmitted Bus off BOFI When TEC ≥ 256 or 11 bits are received 128 times in bus off state Error passive EPI When TEC ≥ 128 or REC ≥ 128 Receive overload warning ROWI When REC ≥ 96 Transmit overload warning TOWI When TEC ≥ 96 Remote frame request RFRI When remote frame is received and corresponding MBIMR is 0 Receive message DFRI When message reception is completed and corresponding MBIMR is 0 Reset/Halt RHI When processing is completed after software reset request (RSTRQ) or halt mode request (HLTRQ) is issued When TEC or REC becomes 128 after incrementing or decrementing, note that the error passive (EPI) flag issues an interrupt request. When REC or TEC becomes 96 after incrementing or decrementing, note that the receive overload warning (ROWI) flag or transmit overload warning (TOWI) flag issues an interrupt request, respectively. |
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